Moving from Tax credits to Universal credit

Anyway I currently get Child tax credits. We would have been entilited to income support (due to DS getting DLA), but now our area is covered by universal credit for new claimants so we have to apply for universal credit. Im worried that my tax credits are going to stop now and I wont get any money until mid August. Is this true? Or do tax credits continue until I get a payment from universal credit?

I have enough to cover bills for the month and a credit card (which Id rather not use), but nothing to buy food if the Tax credits stop.

Disclaimer - Im obviously looking for a job in the mean-time, but it doesnt necessarily mean I'll get one too quickly.

Yes we filled out an income support claim and was told it had to be universal credits as it was a new claim. We weren't claiming income support before, just tax credits, but without any wages these aren't enough to pay the rent let alone bills and food etc.